POWER SUPPLY DEVICE

Embodiments of the present application relate to a power supply device, including a housing, a circuit board and a connecting assembly. The housing defines an accommodation space, and includes: a housing positioning component, a first opening, and a second opening. The housing positioning component is disposed in the accommodation space. The circuit board is disposed in the accommodation space, and includes: a circuit board positioning component, a power input port, and a power output port. The power input port is disposed corresponding to the first opening. The power output port is disposed corresponding to the second opening, and electrically connected to the power output port. The connecting assembly is configured to connect the housing positioning component and the circuit board positioning component, and position the circuit board in the accommodation space of the housing.